§ 250.603. Exposure factors for site-specific standards.
(a) A risk assessment for the site-specific standard shall use site-specific exposure factors under the EPA’s Exposure Factors Handbook: 2011 Edition, 2011 (EPA/600/R-090/052F) or exposure factors used in the development of the Statewide health standards identified in Subchapter C (relating to Statewide health standards).
(b) If a person uses site-specific exposure factors that deviate from the standard exposure factors in Subchapter C, the site-specific exposure factors shall be clearly justified by supporting data. The person shall provide the supporting data in the site-specific risk assessment report.
(c) The exposure factors shall be selected based on the land use of the site with reference to current and currently planned future land use and the effectiveness of institutional or legal controls placed on the future use of the land.
(d) The person shall document in the site-specific risk assessment report the future use of the site.
Authority The provisions of this § 250.603 amended under sections 104(a) and 303(a) of the Land Recycling and Environmental Remediation Standards Act (35 P.S. § § 6026.104(a) and 6026.303(a)); and section 1920-A of The Administrative Code of 1929 (71 P.S. § 510-20).
Source The provisions of this § 250.603 amended November 19, 2021, effective November 20, 2021, 51 Pa.B. 7173. Immediately preceding text appears at serial page (355308).
Cross References This section cited in 25 Pa. Code § 250.602 (relating to risk assessment procedures); and 25 Pa. Code § 250.606 (relating to development of site-specific standards).
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